Yoko Tsukamoto began illustrating Duel Masters cards for Wizards of the Coast during production of the Survivors of the Megapocalypse set, for which Yoko illustrated Ruthless Skyterror.

You can look up Ruthless Skyterror, along with every other Duel Masters card printed in English, in the Duel Masters card database, here: http://www.wizards.com/duelmasters/dmdb.asp Note that the database does not show promotional cards.